CN202855162U

CN202855162U - Laboratory demonstration instrument for small aperture imaging

Info

Publication number: CN202855162U
Application number: CN 201220527990
Authority: CN
Inventors: 代顺林
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-10-16
Filing date: 2012-10-16
Publication date: 2013-04-03
Anticipated expiration: 2022-10-16

Abstract

Disclosed in the utility model is a laboratory demonstration instrument for small aperture imaging. The demonstration instrument comprises a demonstration box; a long horizontal hole is arranged in the middle on a front plate of the semitransparent demonstration box; vertical reels are symmetrically installed at two end of the long hole inside the box body; and a semitransparent film for blocking the long hole is strained and coiled on the two reels mutually. Besides, a triangular hole with the side length of 20 to 30mm, at least five circular holes whose aperture diameters are successively changed in a range of from 10 to 0.2mm, and at least three crack holes whose lengths are successively changed in a range of from 60 to 30mm and the widths are successively changed in a range of from 3 to 0.5mm are successively installed on the film from one side to the other side along the horizontal central line. A strong luminophor is installed at the rear of the semitransparent film inside the box body; a grid aperture mesh enclosure is covered on the strong luminophor; and a optical screen for demonstration is arranged externally in front of the box body. According to the utility model, the demonstration instrument with advantages of high brightness, clear image, good demonstration effect, easy manufacturing, low cost, stable performance, and good popularization value is provided for the small aperture imaging technology.

Description

Pinhole imaging system laboratory demonstrator

Technical field:

The utility model relates to the teaching demonstration apparatus, particularly a kind of pinhole imaging system laboratory demonstrator that is applicable to middle and primary schools' physics or Science Teaching.

Background technology:

The pinhole imaging system phenomenon is that the rectilinear propagation performance owing to light forms, it and mirror-reflection imaging, and the lens reflection imaging is stood like the legs of a tripod and has jointly been consisted of complete geometric optical imaging system, and the status in teaching can't substitute.But the pinhole imaging system instrument that uses in the teaching at present structurally mostly imitates camera, is comprised of aperture, darkroom, imaging screen, and imaging screen is selected frosted glass or paraffin paper.The defective that exists is that imaging is too dark and fuzzy, does not reach the purpose of teaching demonstration, and is bad because of effect, gradually withdrawed from textbook.

The invention task:

The purpose of this utility model provides that a kind of clear picture, brightness are high, teaching demonstration is effective, and make easily, cost is low, stable performance, the pinhole imaging system laboratory demonstrator promoted easily.

The technical solution of the utility model is finished as follows, pinhole imaging system laboratory demonstrator, it comprises a demonstration box, it is characterized in that: be provided with a horizontal slotted hole in the middle of on the front panel of a translucent demonstration box, in the casing at slotted hole two ends, be symmetrically installed with a vertical reel, tension is wound with a semitransparent thin film that can block slotted hole mutually on two reels, at delthyrium and at least five circular holes that the aperture changes between 10-0.2mm successively that along horizontal center line from a side direction opposite side length of side to be installed successively on the film be 20-30mm, at least three length are between 60-30mm, the seam hole that width changes between 3-0.5mm successively, a strong luminophor is installed in the case of the back of transparent membrane, be covered with a square hole guard at strong luminophor, the place ahead is provided with a demonstration optical screen outside casing.Strong luminophor is electricity-saving lamp or LED luminophor.

The utility model provides a kind of brightness height, clear picture, good demonstration effect for the pinhole imaging system technology, and make easily, cost is low, stable performance, very the demonstration instrument of promotional value arranged.

Description of drawings:

Fig. 1 is structural representation of the present utility model;

Fig. 2 is the plan structure synoptic diagram of Fig. 1;

Fig. 3 is the structural representation of semitransparent thin film.

Embodiment:

Describe by reference to the accompanying drawings embodiment in detail, the utility model is that the centre is provided with a horizontal slotted hole 2 on the front panel of a translucent demonstration box 9, in the casing at slotted hole two ends, be separately installed with a vertical reel 3, tension is wound with a semitransparent thin film 6 that blocks slotted hole mutually on two reels, on film along the horizontal center line delthyrium 8 that to be provided with successively a length of side from left to right be 20-30mm, six are arranged in order diameter is the circular hole 7 that diminishes gradually between 10-0.2mm, three length are that 60-30mm width is the seam hole 4 that 3-0.2mm diminishes gradually and is arranged in order, a strong luminophor 1 is installed in the case of film back, be covered with one deck square hole guard 5 at strong luminophor, the place ahead is provided with a demonstration optical screen 10 outside casing.The material of translucent demonstration box can be selected translucent glass or organic glass, plastic plate etc., also can stick one deck semitransparent thin film at sheet materials such as clear glasses, it is that the brightness of the brightness of the luminous object seen by semi-transparent camera-lucida and pinhole imaging system approaches and gets final product that translucent degree requires.Strong luminophor is electricity-saving lamp or LED luminophor.

During demonstration, as long as will demonstrate the appropriate location, the place ahead that optical screen is placed on demonstration box, light strong luminophor, then rotating drum makes the semitransparent thin film move left and right, and light is radiated on the optical screen by micropore on the film, will form pinhole imaging system.Its advantage is to see simultaneously object, aperture and picture, and clear picture, and good demonstration effect has the teaching promotional value very much.

Claims

1. pinhole imaging system laboratory demonstrator, it comprises a demonstration box, it is characterized in that: be provided with a horizontal slotted hole in the middle of on the front panel of a translucent demonstration box, in the casing at slotted hole two ends, be symmetrically installed with a vertical reel, tension is wound with a semitransparent thin film that can block slotted hole mutually on two reels, at delthyrium and at least five circular holes that the aperture changes between 10-0.2mm successively that along horizontal center line from a side direction opposite side length of side to be installed successively on the film be 20-30mm, at least three length are between 60-30mm, the seam hole that width changes between 3-0.5mm successively, a strong luminophor is installed in the case of the back of transparent membrane, be covered with a square hole guard at strong luminophor, the place ahead is provided with a demonstration optical screen outside casing.

2. pinhole imaging system according to claim 1 laboratory demonstrator, it is characterized in that: strong luminophor is electricity-saving lamp or LED luminophor.